US2697273A - Puller - Google Patents

Description

Dec. 21, 1954 P. H. CLARKE ETAL FULLER 2 sheets-sheet 1 Filed DeC 30, 1948 .IIIII llllllllllllllllll! i Dec. 2l, 1954 P. H. CLARKE ETAL FULLER 2 Sheets-Sheet 2 Filed Dec. 30, 1.948

United States Patent O Clarke, lWashington, D'. (22,.. andi Richard' M.

Phillips, Hi. A The4 Rlains, Va.; saiii, (Iutts. assi'gnor` to. sani;

CUSB. Clarke 'lhisinventionI relates: to-A pulling devices, and` especially; to. combinationV jackescrew and slide hammerpullersr. thetypedisclosed? in Johnson and Clarke Patentv No.` 1,893,4il4; granted.i January- 3;, 1933i and' aims: generally.` to improve ther same. v

'Fool'sfofithenlas-s, exemplified inA the= said Johnson antl- Clarhe patentiembodyatensioning and alignihgrrodhavmg; an@ extended; threaded'v area onto# which various Worleengaging devices` may bei threaded, which rod carres. at relativelyI heavyslide hammer element:A In usetof'such. tQol's-themorrectiworkengagngdevice has'heretofre-vbeen' selectedf and; threaded: onto the rod; then tool.; being; then: hel'din oney hand* while the worin-engagingv deviceist` mainipulatedto.- engage the world, with the. othergand the; rod' being; then` threaded. through' thev wol-1t"-engagi'ig; means into engagement with' an' abutmentY to preali'gm the: toolf with the work, provide initial=v pulling tension', or.; adjust? the length of the rod, the hammer beinggthenmanipulated to; augmenti the initial' tension` with., a, prealignedi impactz force.. tok effect, removal' ofi' the.. part..

In. such tools. it` has. beentounddesirable., to providethe. world-engaging, devic e. when, the latter. comprises, two; or.l more pivotedlworkrengaging arms,',with.means.for adjusts ing the.'y spread off those, arms. to. engage. themrmly. with'. the; work.. The. provision. ofi such adiustingmeans.. hcw..` evenhas. rendered. itnecessary. to. manually. liold thelool. in; nearly aligned' position` with.. one. hand; during, the; ma; nipulation; of.A the arm adjusterswith theotbenas welLas. during` manipulation off the: tensioning rodi Due.4 to4 the.' weight. ofi the. extended; rodi and, hammer; this. hasA beeni fatiguing and. has.. sometimes. resulted; in az failure. oilther mechanic. to, properly apply. the tool.-` to the. worldv in ,additiomin mostzcasesthe, aligning ro dof. the.puller.V is; threaded throughl the. selected workfengaging; means a. substantial1 distanceduring use of. the.to.ol,.and it. is-necesssary to unscrew it many turfnsbeforetheftoolcan-.beapfplied to other work or have other heads and adapters applied thereto.

The present, invention, among other. objects, aims to provide a puller toolquickly and; easily'adjusted to the work,a;ndione in which the adjustmentiof the tool tapan ticular jobs; and theexchange.oheadsrthereon iszquidly and^ easily accomplished.

More.A specifically.. the. invention aims: to,A providea. tool E the cl ass; described in. which thei work-engaging head is,l slidably adjustable.r to any. selected position on*l the threaded; rodf. and.. there. s ecurable. inf threaded' relation;

The inventionalso. aimstoprovide such a toolhaving ant inexpensive and simplebut effective. construction. Other. objects; and advantages. ofthe.. invention will be apparent; from the.. following detailed: description'A of exemplaryr embodiments. thereof.

The invention` resides. in` the. novell features and i come, bihation: off partshereinafter described? andE pointediontY in the; appendedi claims.

In. the= accompanying' drawings` illustrating preferred embodiments: of the invention:A

Fig. 1 is a side elevation and Fig. 2 an elevation partly in longitudinal section of a puller with parts of the rod cut away.

Figs. 3, 4 and 5 are transverse sections taken, respectively, on the lines 3 3, 4 4, and 5-5 of Fig. 2 looking in the directions indicated by the arrows.

Fig. 6 is a perspective view of the tool of Fig. 1.

Fig. 7 is an end view of a modied form of headmeans for securing it;` to the:` head` attaxzhing.isplit-threaded?elementianchsecuring"meamrtlieresn ort.

Inf the` illustrative.` embodiment'. showin im Figs.- the puller comprises a screw-rod 10 threadedifr atsub' stantialdistance adjacent its innen endi The-rod inthe form sli-owni` is provided withi ai head 151, frmedi' torprro,- vid'effor# application` of? a. turningY force thereto: 1`i1- theh formi shownthe rodheadf 1X1#` is' of hexagonal: crosse section to receive a turningi vtlrencliandv has a` transverse aperture lf2." therethrough tir receives as turning; barton. the like; In; thefh'nm shown av slide-hammer element;l 13j is sldabyf mounted onthe` rodF 10i and` at' one: endl of" its; stroltezabuts: against the rodi-head 11.

Theworkeengaging-meanszon head2 14"mayfbe` ofvaritiustypes; certain off whicrlrv are illustrated ih; the abovemenr tioned: Johnsonl and Clarke patent: Preferably' several."l differentI types of heads; are provided in-V a puller; set to. adapt it'toavaricty ofwork; Thus while the,toolsrliere.- irrshown: provided with' a headx 140i the three-way yoke; typm, i`tis to be: understood.' that' the, inventioniii its; broader aspectsj is'notf limited' to thisY type ofworlfengag.- ing means; andi mayrbe,v provided. with oneA or. more. select;- able heads:

Ih" accordance with` this invention, the` work-head. 14;, shown as., comprising a. control.' spider. member 14a. andi pivoted work-engaging arms.1`4b, comprises a. centralhubx member 15` whichrissboredrto. slidably, htover. theA threaded portion..drthe.l rod 1'0; Thusgthe, headzll may, be. slipped.. onto: orgfrom. the. rod. andmay.' be sliditherealongtu Releasable. means.. is. also. providedfon threadedlyk atetacliilg,tlie:liead4 14.1.to .therod L when. it hastbeen-,slidl longitudinally to its adjusted' position-11nd, to-provtide: fion settingup; ot therodr therethrough forl applying tension andi/or. preahgning thesl'de.A hammer blown. In therform; shownr in. Figs. lf-.. this means;x comprisesf at splitsthreadedi memben 16, the; t-wo. halves; ofi which, close: uponr the:l threaded. portion, of' the:l rod, and wnichi is; providedi with.

In. the` formi showni, the. hub) 15.l off, heads 14;. whicht is; centrally bored to.` sldingly^ fit: the: rod. 10; has; externallys threaded. ontit' a carnmingtdiscmr.Y cone 17,.` which engages; between; the: reanwandlyprojecting; tail. portionsr ofi the,l arms 14111 to.` spread them; apart.v AV length of: coil@ spring4 18 embraces the: rearwardly.V projecting' tail; portionsv to@ resiliently urge-.lthefarmsnsspread positionsinsthefarrarrgementi. shown. "Eher arms 14b are-reversible; like. those showniinrtheflbhnson and Glarkeepatent, but are=provided`= withe.ars:19;.whichproject:outwardly in1thereversedfposiltiom offthezarms; fonwardly of' their pivotpoints: Thusfv when; the; arms; are: reversedi` the` spring 'may' beffmoved to# lie between the spider member 14a and the ears to holdi` ther arms: in.` contractedposition against! a` spreader discf or" cone; (.,notfl shown which may be positioned'` bestween ther arms,- eitherI on'V the tipil-ila-y of-the1r.o'dA Iii-as shown; in'. the- Johnson; and Clarke: patentg, orotherwise.-

Witlr ther arrangement shown in` Figs;A 1 -6' it: will? bei` seenA that the` completel headi assembly; including'thcam.- mingqdisc^17 the springflSjfandthe amis; forms ansingle.' unit! through whichy therod'y 10- may' be slipped; either beforel--orfaiterthelY work-engaging unit; is adjusted tothewor Asfi'sfbestshown-in;Figs: 2 and 6; the;splitthreadedi memberI or splitnut 16'fish secured; tothe workengaging head? 14 Thissecurement is. preferably effected; by' the interengagementV ofv groove and ange` means' 20-202z arranged" on theI split-threaded', member: 1,65 andv` the hubv of' theheadf' 14:` The flange; means,l orc0l1`ar 20l1; carried' byt thev head" or work-engaging; meansk 14 i's` exter nal; or ma1e andi preferably termedl integral"l with the. yoke; spider, or. body portion: Mal thereof; This element,l however; may.' ben made separatelyand beg. secured to the.; tool headsbyr welding;` swaging; riveting, threading or' otherwise, and the flange means may be continuous or discontinuous, as desired.

Preferably as shown, the interengaging means 20-20a are formed to limit relative rotation between the splitthreaded member and the head 14, as by providing a non` circular engagement or rotary abutment therebeween. In the form shown this is accomplished by providing one member, herein the groove of the split unit 16, with at least one projecting element or stud 21, to engage an abutment means provided by the other member, herein formed by the walls of one or more slots or recesses 22 inthe ange 20a carried by the hub 15. shown the stud 21 is provided by a pin driven into a boredout hole in the ilange of the split-nut 16, and ush with its front face.

Where practicable, friction between the parts 20-20a, or manual or tool gripping of the sleeve 16 (as by a bar inserted in one of the holes 16a) may be relied upon to insure relative rotation of the split-nut 16 and the screwrod to assure advance thereof.

The split-nut or split-threaded member 16 is also provided with means for releasably securing it in its closed or driving relation tothe rod and head. In the form of Figs. 1-6 this means comprises an internally tapered sleeve 23, adapted to frictionally t the tapered section 24 of the split-nut 16, to be tightly engaged thereon by a slight blow. In the form shown this blow may be imparted by backing the hammer 13 against the sleeve 23, and the sleeve may be disengaged from the tapered section 24, as by inserting a wedging or prying member between the adjacent faces of the members 16 and 23, or by tapping against the inner side of a rear ange 25 provided on the sleeve 23. Due to inertia effect this arrangement cooperates effectively in the slide hammer embodiment, since after the hammer has seated the member 23, subsequent blows of the hammer 13 against the head 11 serve to tighten, rather than loosen, the engagement of the sleeve with the split member 16.

The parts of the split-nut section 16 may be movably associated in any suitable way, as by the hinge connection 26 (Figs. 4 and 6). The groove and ilange arrangement Ztl-20a, in the form shown, tends to guide the two halves of the split thread into proper engagement with the threads of the rod 10, thus assisting the hinge 26 in maintaining proper alignment.

In the form shown, the locking sleeve 23, split sleeve 16 and camming disc 17 are provided with knurled surfaces tofacilitate manual turning or holding thereof, as well as with holes 16a and 17a to receive a turning bar. The hinge 26 of the split-nut element performs not only the function of keeping the two parts together, but also acts as a guide to mutually align the female groove and flange sections 20 and the threads in the two halves of the split member. The elements 20, 20a serve not only to lock the slidable head 14 to the split nut, but also act as a guide to align the threads of the split member 16, in lieu of or supplemental to the hinge 26.

In using the tool of this invention, to free a pullinghead from the threaded rod it is merely necessary to release the split-nut 16 and slide the head along the rod. To secure a selected head to the rod it is merely necessary to slide the rod through it to the proper location, and close the split-nut in embracing relation to the head and rod.

In attaching the tool toa machine part to be removed, say a gear to be removed from a shaft end, the head assembly 14 alone, by means of the spreader 17, may first be adjusted to the part without handling of the rod and hammer at all. The rod 10 may then be quickly slipped throughthe positioned head and into abutting relation with the shaft end. The split-nut may then be closed about the parts and locked against spreading, after which a very few turns of the rod through the split-threaded member suffices to align the puller and apply pulling tension to the work. A quick tap of the hammer 13 against the rod-head 11 may then be employed to augment the initial pulling tension and easily moves the workpiece without tilting it and damaging the parts. Where a long draw under impact of the hammer is required, the rod 10 may be brought to bear against the shaft end between each movement of the part effectedlby the hammer operation, thus insuring correct alignment of the pulling force. When the part has been moved to a sufficiently loose position, it may be drawn free simply by further advancing the screw rod 10, and when the parts are to 'be adjusted In the form i work-pulling 4its closed position,

for a second pulling operation it will not be necessary to reverse this screwing operation, as the head may be dropped free from any partof the extended threaded area of the rod and repositioned thereon as desired.

As above mentioned the invention is not limited to the preferred form shown in Figs. 1-6. Merely by way of illustration, and without intention of limiting the invention thereto, a further exemplary form is illustrated in Fig. 7. In this arrangement the two halves of the splitnut are secured together by locking means shown as a toggle latch 30, which grips them tightly together just as it passes its dead center position, and no tapered members are required.

Having described preferred embodiments illustrative but not restrictive of the invention, what we `claim is:

1. A puller tool comprising a combined screw and slide hammer rod having an extended threaded area and having a hammer impacted head at one of its ends, a head formed to slide longitudinally along the threaded area of said rod, a slide hammer mounted on said rod between said hammer impacted and workpulling heads, a nut closable on said threaded area, said nut having an externally split end portion facing said slide hammer, means for securing said split-nut to said work-pulling head and means for locking said nut in its closed position, said locking means comprising an internally conical sleeve between said end portion and the slide hammer, engageable over said end portion, and tightenable thereover by manipulation of said slide hammer, said nut constituting the sole means for securing said pulling head to said threaded rod, so that extended threaded movement of the parts is unnecessary while on engagement of said last named means, impacts of the yhammer against the hammer impacted head cause the rod to pull on the work-pulling head to cause the latter to pull on Vthe work.

2. A puller tool comprising a combined screw and slide hammer rod having an extended threaded area and having a hammer impacted head at one of its ends, a

work-pulling head formed to slide longitudinally along the threaded area of said rod, a slide hammer mounted on said rod between said hammer impacted and workpulling heads, a split-nut closable on said threaded area above said work-pulling head, engaging means carried in part by said work-pulling head at one end thereof and in part by said split-nut at its bottom end thereof for detachably securing said split-nut to said work-pulling head, and releasable locking means for locking said split-nut in said nut constituting the sole means for securing said pulling head to said threaded rod, so that extended threaded movement of the parts is unnecessary while on engagement of said last named means, impacts of the hammer against the hammer impacted head cause the rod to pull onthe work-pulling head to cause the latter to pull on the work.

YReferences Cited in the ile of this patent UNITED STATES PATENTS Number Name Date 122,243 Flower Dec. 26, 1871 288,560 Ellrich Nov. 13, 1883 750,675 Michelin Jan. 26, 1904 937,364 Dolder Oct. 19, 1909 1,005,227 Jones Oct. 10, 1911 1,062,000 Hahn May 20, 1913 1,075,384 Seidel Oct. 14, 1913 1,313,511 Beach Aug. 19, 1919 1,468,334 Thomason Sept. 18, 1923 1,585,738 Rowland May 27, 1926 1,648,106 Brewer Nov. 8, 1927 1,840,187 Davis Jan. 5, 1932 1,893,414 Johnson Ian. 3, 1933 1,958,329 Beard May 8, 1934 2,421,324 Graham May 27, 1947 2,467,982 Maris Apr. 19, 1949

Images